The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2025
Filed:
Aug. 04, 2020
Hamamatsu Photonics K.k., Hamamatsu, JP;
Yoichi Kawada, Hamamatsu, JP;
Hiroshi Satozono, Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
An optical element includes a laminate including a first refractive index layer and a second refractive index layer having different refractive index for terahertz waves, wherein the laminate includes a pair layer group in which a plurality of pair layers including the first refractive index layer and the second refractive index layer are laminated, wherein the thickness of the first refractive index layer and the thickness of the second refractive index layer are each smaller than a wavelength of the terahertz waves, and wherein each of the pair layers has a predetermined effective refractive index for the terahertz waves depending on a thickness ratio between the first refractive index layer and the second refractive index layer.